How and where to buy the iPhone 6S and iPhone 6S Plus

How soon can you get your hands on Apple's latest iPhones? Learn when you can pick up the iPhone 6S or 6S Plus. Plus, get details about Apple's new monthly pricing plan and the deals carriers are offering.

During a keynote event in San Francisco earlier this month, Apple unveiled the iPhone 6S and the iPhone 6S Plus . Apart from a new rose gold color option, the new iPhones look the same as last year's models, though Apple has added stronger glass and aluminum to help prevent the phones from bending when sat on. On the inside, the new models get a new processor, better cameras and haptic feedback to allow for 3D Touch.

The iPhone 6S and the 6S Plus will be available in stores on Friday, September 25. The new models will be available direct from Apple and carrier locations.

Pricing for the iPhone 6S and 6S Plus remains the same as last year's iPhone 6 and 6 Plus, though Apple has new monthly installment plans, and the carriers have a number of deals and promotions.

In the US the iPhone 6S will start at $199 for the 16GB model; $299 for the 64GB model; $399 for the 128GB model with a two-year contract. Off-contract prices iPhone 6S jump to $649, $749 and $849, respectively.

The iPhone 6S Plus with a two-year contract will cost $299 for the 16GB; $399 for the 64GB; and $499 for 128GB. Off-contract prices for the iPhone 6S Plus jump to $749, $849 and $949, 16GB, 64GB and 128GB, respectively.

Apple

You can line up on Friday, September 25, at an Apple Store to buy a new iPhone. In addition to the standard on-contract and full retail pricing options, Apple has introduced a new pricing plan it calls the iPhone Upgrade Program.

Available for now only in the US, the plan costs $32.41 a month for the 16GB iPhone 6S, $36.58 a month for the 64GB iPhone 6S and $40.75 a month for the 128GB iPhone 6S. Pricing for the iPhone 6S Plus is $36.58, $40.75 and $44.91 a month for the 16GB, 64GB and 128GB models, respectively. You'll need to sign on for two years, but you'll have the option to trade in your iPhone for a new model each year. And Apple throws in AppleCare coverage to sweeten the deal.

In order to take part in the new iPhone Upgrade Program, you will need to visit an Apple Store in person. You can, however, make a reservation to do so.

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AT&T

With AT&T Next plans, you pay the full retail price of the phone over a certain period: 20 months, 24 months or 30 months. You can upgrade after 12 months with the 20-month plan, after 18 months with the 24-month plan, and after 24 months with the 30-month plan. The 20-month Next 12 plan costs $32.50 a month for the 16GB iPhone 6S, for example, or only $21.67 a month for the same phone with the 30-month Next 24 plan.

AT&T will give you up to $300 in credits if you trade-in your current phone and purchase an iPhone 6S with a Next plan. The $300 breaks down like this: trade in your current phone for up to $200 to be put toward the purchase of an iPhone 6S. Switch from another carrier and get a $100 bill credit. Check out AT&T's trade-in page for more information.

Sprint

By way of its iPhone Forever plan, Sprint is offering the 16GB iPhone 6S for $22 a month and will let you upgrade with the next iPhone is released. And if you trade in your current smartphone by the end of the year, the monthly rate drops to $15 a month. The same deal applies to the 16GB iPhone 6S Plus; pay $26 a month or only $19 a month with a trade-in.

Sprint just announced a new deal for iPhone 6 owners. Trade in your iPhone 6 and you can can buy a 16GB iPhone 6S for only $1 a month or a 16GB iPhone 6S Plus for $5 a month.

More about Apple's new phones

T-Mobile

T-Mobile will offer the 16GB iPhone 6S for $20 a month and the 16GB iPhone 6S Plus for $24 a month for 18 months with Jump On Demand upgrade program. Then at the end of 18 months, you will pay $164 to keep the iPhone 6S, which means you'll end up paying $524 for the phone or $125 less than Apple's off-contract $649 retail price for the phone. Check out T-Mobile CEO John Legere's rambling blog post and video for more.

T-Mobile has added a new offer for trade-ins. Trade in a smartphone and you'll pay only $5 a month for a 16GB iPhone 6S or $9 a month for a 16GB iPhone 6S Plus through its Jump On Demand program.

The Jump On Demand deal appears to be a good one, though there is no information yet on pricing for the 64GB and 128GB models or if they'll receive similar discounts.

If you don't want to go the lease-to-own route with a Jump On Demand plan, you can opt for one of T-Mobile's Simple Choice plans. You'll pay $27.08 a month for any capacity iPhone 6S and $31.25 a month for any capacity iPhone 6S Plus; the only difference is the down payment. You'll pay $0 down for either 16GB model, $99.99 down for either 64GB model, and $199.99 for either 128GB model.

Verizon

Verizon has done away with subsidized pricing and two-year plans, except for existing customers. New customers will either need to pay full retail price for a phone or choose a monthly plan. Verizon's monthly plans start at $27.08 for the iPhone 6S and $31.24 for iPhone 6S Plus. Do the math and you'll find that you'll end up paying the full retail price for an iPhone 6S or 6S Plus over the 24 months of the plan.

Like AT&T, Verizon is happy to buy your current phone. It offers up to $300 (in the form of a Verizon Wireless gift card) for trade-ins, and it'll throw another $100 bill credit at anyone that is switching from another carrier. Head to Verizon's appraisal page to see what your phone is worth. You'll need to answer a few questions about the condition of your phone. To give you a data point, I would get $206 for my iPhone 5S that is free from cracks, dents and other deformities.

International pricing

In the UK, the iPhone 6S costs £539 (16GB), £619 (64GB) and £699 (128GB). In contrast, the 6S Plus will go for £619, £699 and £789, respectively.